Apparatus for drying by compressed air.



W. E. HALL. APPARATUS FOR DRYING BY COMPRESSED AIR. APPLICATION FILED MAR. 22, 1905.

1 ,09 1 ,2 1 5 Patented Mar. 24, 1 9 14.

2 SHEETS-SHEET 1.

5 EPA RATOI? avwzwtcm m K? am 95% Gwen lugs" APPLIOATION FILED ,MABNZB, 1905.

IIIIIIIIIIIIIIIIIII W. E. HALL.

APPARATUS FOR DRYING BY COMPRESSED AIR.

Patentd Mar. 24, 1914 2 snnma-sn'snr 2.

. is the locationof a. reducing valve between sion, the variator and separator will be transposed, and thus the compressed air will i be caused to travel first. through the scparator and then through the variator; that is, f the pipe (1. conveying the air from the coml pressor will be conn'ected directly with the I separator at b, and'th air passing out of the sepa ator at no will be led to the same end of the variator which in Fig. 2 is connected with the pipe (1. The outlet of the 3 variator will be connected with the place of use. In the variator a heating medium will be circulated around the pipes '0, instead of a cooling medium. This altered arrangement is illustrated in Fig. 4:.

When extreme dryness is not required and a temperature of practically the air before 1 compression is desired, the arrangement shown in Fig. 3 may be used. In this instance, the compressed air passes from the compressor 1 through a pipe 2 into the sep- '1 arator,3' which may be of the same general character and operate in the same manner as the separator described with respect to and shown in Fig. 2. From the separator 3 the air may pass through a reducing valve -lto the drier or to the point where it is desired to use said. air, either under compression or at practically atmospheric pressure.

By my invention 1 provide means for drying substances and articles of various kinds in an etlicient manner owing to the removal 1 of a large amount of moisture from the air. l

The apparatus is valuable in the drying of 1 fabrics and matches, for example, and the} regulation of pressure depends as does the i regulation of temperature on the particular substance to be treated.

The apparatus is not affected by changes in the humidity of the atmosphere, and constant conditions may be preserved by a proper regulation of the apparatus.

A very important feature of my invention 1 the compressor and the discharge device. I give the term reducing valve the meaning generally given in the art, that is, l designate by such term a valve which will maintain a particular determined pressure on the discharge side irrespective of fluctuations on the supply side. .It will be obvious that the compressor'will, cause a pulsating effect in the p i ping :ron the supplyside oi the rc- 1 ducing.valveand"unless I employ a reducing valvehaving these characteristics, that is,

tho-property of automatically maintaining a constant pressure on the discharge side, a

- pulsating jet would be delivered at the discharge device, such as the pipe TL i l A uniform action would be impossible with such I a 'pulsating jet. in view of the fact that each material to be dried requires for the securing J of the best resultsgai definite velocity of the drying medium. It is well known that reducing valves as ordinarily made are provided with an adjusting device, whereby the discharge pressure may be altered within certain limits. but of course, the discharge pressure remains constant as long as the adjustment is not changed. lVith my invention therefore I would adjust the reducing valve to the particular pressure which byexpericnce I know to be best for the particular material to be dried and then I would be certain that during the entire process the air would be discharged at the particular velocity best suited for the rapid drying of that material.

Various modifications may be made with out departing from :he nature of my invcntion.

I claim as my invention:

1. .\n apparatus for drying by compressed gaseous fluids. comprising a fluid compresson a moisture eparator for eliminat"- ing moisture from said fluid, a chamber for collecting such'fluid after said elimination has taken place a means for bringing the fluid to a predetermincd temperature and a controlling device arranged to permit the ejection of said compressed dried fluid at a prtuletermincd pressure, said compressor, moisture separator, chamber, means and controlling device being in communication with each other.

2. An apparatus for d r ving by compressed gaseous tluids, con'iprising a fluid compressor, a moisture separator for eliminating moisture from said fluid, a chamber for collecting such fluid after said elimination has taken place; a controlling device ar 'angcd to permit the ejection of said compressed dried tluid at a predetermined pressure, said compressor, moisture separator, chamber and controlling device being in communication with each other and a discharge device connected with and, located beyond said controlling device for directing the discharge of said dried fluid under the predetermined pressure.

3. An apparatus for drying by compressed gaseous tluids, comprising a fluid compressor, a moisture separator for climinating moisture from said fluid, a chamber tot-collecting such fluid after said elimina tion has taken place. a means for bringing the fluid to a predetermined temperature, a controlling device arranged to permit the 1 ejection of said compressed dried fluid at a predetcrmined pressure, said compressor, moisture separator, chamber, means and controlling device being in communication with each other, and a dischar e device connected with and located bcynd said con- 1 trolling device for directing the discharge of said dri'ed fluid under the predetermined pressure.

4. .\n apparatus for drying by compressed gaseous fluids, comprising a fluid compressor, a discharge device through which the dry gas is' arranged to issue, a reducing valve, a moisture separator, and a temperature variat-or connected in series and all three interposed in the connection between'the compressor and the discliarge device, said reducing valve opposing a constant resistance to the passage beyond said valve, of the gas coming from the compressor.

5. An apparatus for drying by compressed gaseous fluids, comprising a fluid compressor, a moisture separator connected to receive the fluid from the compressor, a box having perforations to discharge the fluid against the material to be treated, a conducting means arranged to receive the fluid from the separator and having its dischargeend within said box, a reducing valve located in said conducting means, and a deflector be tween the discharge end of said conducting means and the perforations of the box.

6. An apparatus for drying by compressed gaseous fluids, comprising a fluid oompressor, a moisture separator connected to receive he fluid from the compressor, a box for receiving the fluid and the material to be treated, a conducting means arranged to receiverthe fluid from the separator and havin "its dischar e end within said box g r i and a reducing va ve located in said conducting means arran ed to insure the discharge of the dry fluld at a predetermined constant pressure.

WILLIS E. HALL.

Witnesses:

JOHN LOTKA, Jorm A KEHLENBECK. 

